NullPointerException occurred because at this point there might not have Job Created org.apache.airavata.gfac.GFacException: Error invoking ZK

Experiments,tasks or Job statuses to failed, NullPointerException occurred because at this point there might not have Job Created
org.apache.airavata.gfac.GFacException: Error invoking ZK
at org.apache.airavata.gfac.core.cpi.BetterGfacImpl.invokeInFlowHandlers(BetterGfacImpl.java:722)
at org.apache.airavata.gfac.core.cpi.BetterGfacImpl.launch(BetterGfacImpl.java:576)
at org.apache.airavata.gfac.core.cpi.BetterGfacImpl.submitJob(BetterGfacImpl.java:488)
at org.apache.airavata.gfac.core.cpi.BetterGfacImpl.submitJob(BetterGfacImpl.java:219)
at org.apache.airavata.gfac.server.GfacServerHandler.submitJob(GfacServerHandler.java:182)
at org.apache.airavata.gfac.cpi.GfacService$Processor$submitJob.getResult(GfacService.java:374)
at org.apache.airavata.gfac.cpi.GfacService$Processor$submitJob.getResult(GfacService.java:359)
at org.apache.thrift.ProcessFunction.process(ProcessFunction.java:39)
at org.apache.thrift.TBaseProcessor.process(TBaseProcessor.java:39)
at org.apache.thrift.server.TThreadPoolServer$WorkerProcess.run(TThreadPoolServer.java:225)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.airavata.gfac.GFacException: Error Executing a InFlow Handler
at org.apache.airavata.gfac.core.cpi.BetterGfacImpl.invokeInFlowHandlers(BetterGfacImpl.java:716)
... 12 more
Caused by: org.apache.airavata.gfac.GFacException: An error occurred while creating GSI security context
at org.apache.airavata.gfac.gsissh.util.GFACGSISSHUtils.addSecurityContext(GFACGSISSHUtils.java:99)
at org.apache.airavata.gfac.gsissh.handler.GSISSHDirectorySetupHandler.invoke(GSISSHDirectorySetupHandler.java:48)
at org.apache.airavata.gfac.core.cpi.BetterGfacImpl.invokeInFlowHandlers(BetterGfacImpl.java:712)
... 12 more